Rotary fuel injector



. Dec. 19, 1944. HEDGES I 2,365,636

ROTARY FUEL INJECTOR Filed May 2. 1942 2 Sheets-Sheet l W/T/VESS. 4f/arry fl Qf/ed F6 W-m 554m ,4rr ma Dec. 19, 1 944. H. o. HEDGES2,365,636

ROTARY FUEL' INJECTOR v Filed May 2, 1942 2 Sheets-Sheet 2 Patented Dec.19, 1944 ROTARY FUEL INJECTOR Harry 0. Hedges, Seattle, Wash, assignorto Tabur-Hedges Company, Philadelphia, Pa, a corporation of PennsylvaniaApplication May 2, 1942, Serial No. 441,566

4 Claims.

The invention relates to fuel injectors of the type used in connectionwith internal combustion engines, using so-called solid fuel, commonlymeaning gasoline which is injected into the internal combustion enginein the general form of vapor and under considerable pressure of theorder of 75 to 100 pounds per square inch.

-Ihe principal object of the present invention is to providecomparatively simple, compact and efiicient apparatus for distributinggasoline or the like unmixed with air and designated solid fuel underpressure to the cylinders of internal combustion engines in such a waythat means are provided for controlling and independently adjusting therate of flow, the duration of flow, and the tim of introduction inrespect to the piston stroke.

Another object of the invention is to properly, efliciently andaccurately inject fuel to the cylinders of an internal combustionengine.

Other objects of the invention will appear from the followingdescription at the end or which the invention will be claimed.

Generally stated, the invention comprises, a casing having therein adistributing cylinder provided in its curved wall with a row of ports tothe engine combustion chambers and having therein a pump chamber androtary enginedriven pump elements and equipped with valved communicationto the distributing cylinder for regulating the rate of feed, anopen-ended balanced sleeve valve rotatably and endwise movably mountedin the cylinder and provided in its curved wall with a slot of generallyright angle triangular open area variously alignable with the row ofports to adjust the time and duration of feed or flow, telescopicconnections between the sleeve and a rotary element of the pump, meansfor endwise adjusting the sleeve, and means for setting the sleeveangularly in respect to the telescopic connection to adjust the time offeed in respect to the engine stroke together with a pressure regulator,a fuel return connection, and a primer.

The invention also comprises the improvements to be presently describedand finally claimed.

In the following description, reference will be made to the accompanyingdrawings forming part thereof and in which:

Fig. 1 is a vertical sectional view of a rotary fuel injector embodyingfeatures of the invention;

Fig. 2 is a sectional view taken on the line 22 of Fig. 1 with partsomitted;

Fig. 3 is a. detailed view of the sleeve valve;

Fig. 4 is a sectionalview' taken on the line 4-4 of Fig. l with partsomitted; and

Fig. 5 is aview partly in section .andpartly in elevation of a primer.

Referring to the drawings, I generally is a casing. l Within the casingthere is a'distributing cylinder 2. The cylinder 2 is provided in itscurved wall with a row of. ports 3 fitted with suitable outwardlyopening check-valves in respect to the engine combustion chambers: (notshown because too well understood to require illustration ordescription)- The casing l is also provided with a pump chamber 4 (Fig.4) and in driven shaft and it serves to rotate the pump elements. 1 isthe inlet to the pump chamber.

There-is valve communication from the pump chamber 4 to the distributingcylinder 2. 8 is a rotatably mounted spindle extendin into the casingand its inner end is tubular and communicates with a passage 5leading-Ito the interior of the cylinder 2. The wall of the tubular partof the spindle is provided with a slot H] of V- shaped open area whichis aligned with a passage H communicating with the pump chamber. l2

indicates a crank-arm by means of whichthe rate of flow from the pumpchamber to the cylinder is adjusted. By turning the spindle 8, thev-shaped opening I0 is variously positioned in respect to the passage H,which, therefore, is more or less closed according to the angularposition of the V-slot in respect to it. I3 is an open-ended balancedsleeve valverotatably and endwise movably mounted in the cylinder 2.The: sleeve valve is provided in its curved wall (Fig.

' 3) :with a generally right angle triangular open area or slot l4cooperating with the row of ports and its function is to adjust the timeand duration of feed. The lower end of the spindle B is secured to thesleeve valve I3 and serves to rotate it. The telescopic extension iiofthe spindle 6 is arranged to rotate with and is movable endwise inrespect to it (see Fig. 2). I6 is a spindle extending into the casingand it is provided with a toothed wheel which meshes with circularlydisposed teeth I! on the end of the extension l5 so that the valve l3can be moved upward and downward and adjusted by means of a crank-arm 18on the'end' of the spindle l6.

connection which communicates with the pump chamber on the pressure sideand it is provided with a pressure regulator 2| and a fuel return 22.The pressure regulator comprises a springpressed check-valve in the formof a ball and an appropriate seat with. which it co-operates. Theconnection 20 is provided with a branch 23 that is connected with aprimer. In this branch 23 there is the fitting 24. The primer includes aspring-pressed piston 25 and its cylinder which i is connected with theconnection 23 and with a fixed support 26., The operation of the primermay be described as follows: In starting the engine the handle of theplunger 25 shown at the right in Figure is pulled toward the right. Thisfills the cylinder to the left in Figure 5 with fluid by way of a branchconnection to a reservoir not shown and it also compresses the spring.Upon commencing to start the engine the handle is released and thespring forces the plunger toward the left forcing the fluid from thecylinder past the check valve 24 to the distribution cylinder 2, thus aninitial charge is injected to a cylinder which thereafter operates inthe usual manner.

From the foregoing description, it is evident that the V-shaped slot Illprovides for adjusting the rate of flow of fuel, the triangular openingI4 provides for adjusting the time and duration of flow, and the angularadjustment IQ for the sleeve valve provides for adjusting the time offeed'in respect to the engine stroke,

' It will be obvious to those skilled in the art that mod'fications maybe made in details of construction and in matters of mere form withoutdeparting from the spirit of the invention.

- I claim:

1. A rotary injector for solid fuel comprising,

in combination, a casing having therein a distributing cylinder providedin its curved wall with a row of ports and having therein a pump chamberand rotary driven pump elements and equipped with valved communicationto the distributing cylinder including a tubular valve element having inits curved wall a slot of V-shaped open area positionable to regulatethe rate of flow, an open-ended balanced sleeve valve rotatably andendwise movably mounted in the cylinder and provided in its curved wallwith a slot of generally right angle triangular open area variouslyalignable with the row of ports to adjust the time and duration of flow,endwise slidable connections between the sleeve and a rotary element ofthe pump, means for endwise adjusting the sleeve, and means for settingthe sleeve angularly in respect to the endwise slidable connections toadjust the time of feed.

2. A rotary fuel injector for a solid" fuel comprising, in combination,a casing having therein a distributing cylinder provided in its curvedwall with a row of ports and having therein a pump chamber and rotatingdriven pump elements and equipped with valve communication to thedistributing cylinder, a sleeve valve rotatably and endwise movablymounted in the cylinder and provided in its curved wall with a slot ofirregular open area variously alignable with the row of ports to adjustthe time and duration of feed, connections between the sleeve and arotary element of the pump, means for endwise adjusting the sleeve, andmeans for setting the sleeve angularly.

3. In a rotary fuel injector for solid fuel, the combination of, acasing having therein a distributing cylinder provided in its curvedwall with a row of ports, means for supplying solid fuel under pressureand at regulated rate of flow to the cylinder, a sleeve valve rotatablyand endwise movably mounted in the cylinder and provided in its curvedwall with a slot of generally irregular open area. variously alignablewith the row of ports to adjust the time duration of flow, means forrotating the valve, and means for adjusting the valve endwise.

4. In a rotary fuel injector of the type specified the combination of acasing having therein a cylinder provided with ports, a pump mechanismdelivering to the cylinder, a sleeve valve in the cylinder provided inits curved wall with an opening cooperating with the ports, a fuelreturn connection from the pressure side of the pump, a relief valvecommunicating with the pressure side of the pump and connected to thesource of fuel supply, and a primer including a spring pressed pistonand having a connection with the return connection and thence to thedischarge side of the pump.

HARRY O. HEDGES.

